Lathe attachment.



W. D. JOHNSTON 6: M. J. OLEARY.

LATHE ATTACHMENT.

APPLIoATIoN FILED 111.113, 1911,

1,012,362, Patented Dee. 19,1911.

'fil l I ATTURNEYS 'NITED OFFICE.

WILLIAM D. JOHNSTON AND MATHEW J. OLEARY, OF CHICKASHA, OKLAHOMA.

LATI-IE ATTACHMENT.

T o all whom it may concern.

Be it known that we, l/VILLIAM: I). Jenn siroN and Mari-inw J. OLnanr,citizens of the United States, and residents of Chickasha, in the countyof Grady and State of Oklahoma, have invented certain new and usefulIn'iproren'ients in Lathe Attachments, of which the following is aspecification.

Our invention is an improvement in lathe attachments, and consists incertain novel constructions and combinations of parts, hereinafter'described and claimed.

Referring to the drawings forming a part, hereof, Figure 1 is aperspective view of the improvement, Fig. 2 is a plan view, and Fig. 3is an end view.

The present embodiment of the invention is shown supported on thecarriage 1 of the lathe, by means of a bracket comprising a body or mainportion 2, and a foot or lug 3 offset laterally from the main portion,and having an opening for receiving a bolt 4leXtending through the slot5 of the carriage.

A guide 6 in the form of a plate is secured to the body of the bracketby means of a nut 7 engaging a stem on the body, the said stem extendingthrough an opening in a lug 8 extending from the end of the plate. Theplate is slotted longitudinally at 9, and a block 10 is slidable in theslot.

The upper and lower faces of the block are grooved to receive the edgesof the slot, and a sectional bearing is pivoted to the block. Thebearing comprises substantially semicircular sections 11 and l2, eachhaving radial lugs 13 at its ends. The lugs are superposed, and engagedby screw bolts 111, which secure the sections together.

One of the sections, 11, in the present instance is provided with aradial lug 15 intermediate its ends, and the lug is pivoted to one sideof the block by a pin 16. The block is moved by means of a screw rod 17journaled longitudinally of the plate G and of the slot or guideway 9,and threaded through the block as indicated in Fig. 3. The rod isprovided with a hand wheel 18 for convenience in turning the same, andis held from longitudinal movement in the plate by means of a collar 19on the rod at one end of the plate, and a pin 20 passing through the rodat the other end of the plate. A sleeve 21 is held in the bearing 11-12,the said bearing engaging one end of the sleeve, and it will be evidentthat the sleeve may be moved laterally with re- Specication of LettersPatent.

Application led March 3, 1911.

Patented Dec. 19, 1911.

Serial No. 612,107.

spect to the center pin 27 of 'the lathe, by means of the block orcarriage 10. A cutting head 22 is arranged at the opposite end of thesleeve, and any suitable tool 23 may be held iu the head. The bracket 2is provided with a seat or bed 2t for the center' bar 25 held in thesleeve 21, and the said bar is provided with a plurality of eccentriccenters 2G in the end adjacent to the centering pin 27 of the lathe.

iVith the attachment in use, the capacity of any lathe is doubled, sincethe work may be finished inside and outside at the same time. The work28 is held in the usual clutch 29 of the lathe, and the usual tool, notshown, operates on the outer surface thereof, While the tool 23 of theattachment finishes the inside.

1. In combination with the carriage of a lathe, an arm comprisingconnected laterally offset substantially parallel portions, one of thesaid portions having an opening for permitting its attachment to thecars riage, and the other portion having an elevated flat bearingsurface, a slotted plate secured to the said portion adjacent to thebearing surface, a block slidable in the slot, a rod journaled in theplate longitudinally of the slot and threaded through the block, asectional bearing, means for detachably connecting the sections, one ofthe sections being pivoted to the block, a sleeve held in the bearingand provided at one end with a cutting head, and a centering rod havingeccentric centers in the sleeve, and resting on the bearing surface ofthe bracket portion.

2. In combination with the carriage of a lathe, an arm comprisingconnected later ally offset substantially parallel portions, one of thesaid portions having an opening for permitting its attachment to thecarriage, a slotted plate secured to the other portion adjacent to thebearing surface, a block slidable in the slot, a rod journaled in theplate longitudinally of the slot and threaded through the block, asectional bearing, means for detachably connecting the sections, one ofthe sections being pivoted to the block, a sleeve held in the bearingand provided at one end with a cutting head, and a centering rod havingeccentric centers in the sleeve.

3. In combination with a lathe, a bracket arm having means whereby itmay be conone end with a cutting head, a centering rod in the sleeve,and means for moving the block, said means comprising a rod threadedthrough the block and journaled in the plate.

4. In combination With a lathe, a bracket arm provided With meanswhereby it may be connected with the carriage of the lathe, av slottedplate on the arm, a block slldable in the slot, a sectional bearingpivoted to 15 the block, means for detachably connecting the sections, asleeve held in the bearing and provided at one end with a cutting head,and means for moving the block in the slot.

WILLIAM D. JOHNSTON. MATI-IEVV J. OLEARY. Witnesses:

GEORGE U. MGKINNEY, OSCAR E. FERGUSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

